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Chapter 3 Flashcards

1
Q

What is the AD of OSPF?

A

110

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2
Q

What is the AD of RIP?

A

120

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3
Q

What is the AD of a static route?

A

1

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4
Q

What is the AD of a directly connected route?

A

0

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5
Q

What is the AD of eBGP?

A

20

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6
Q

What is the AD of an internal EIGRP route?

A

90

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7
Q

What is the AD of IGRP?

A

100

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8
Q

What is the AD of IS-IS?

A

115

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9
Q

What is the AD of an external EIGRP route?

A

170

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10
Q

What is the AD of iBGP?

A

200

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11
Q

If there are two or more routes for a destination IP address, what metric is used to select the best route?

A

Longest prefix match

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12
Q

If two routes have the same prefix and subnet ID, how is the best route selected?

A

Lowest administrative distance

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13
Q

If two routes have the same prefix, subnet ID, and administrative distance, how is the best route selected?

A

Routing protocol metric

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14
Q

What are two examples of distance-vector routing protocols?

A

RIPv1, RIPv2, EIGRP

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15
Q

What metric does EIGRP use?

A

Number of hops + latency + bandwidth

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16
Q

What are two examples of link-state routing protocols?

A

IS-IS, OSPF

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17
Q

What is the command to add a static route?

A

(config)# ip route (ip address) (subnet mask) (next hop ip address)

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18
Q

What is a floating static route?

A

A static route that is used as a fallback for dynamically discovered routes

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19
Q

For OSPF configuration, which parameters must match on device configuration?

A

OSPF process ID
OSPF area
Hello/dead timers

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21
Q

What virtual MAC address is used for HSRP? version 2

A

0000.0c9f.fXXX

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21
Q

Which FHRP can support multiple vendors?

A

VRRP

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22
Q

What virtual MAC address is used for HSRP version 1?

A

0000.0c07.acXX

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23
Q

In OSPF, when do routers become full/adjacent neighbors?

A

When both routers have the same set of LSAs

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24
Q

In OSPF, when do routers become 2-way neighbors?

A

When both routers have exchanged their seen RIDs and have the same information

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25
In what sort of network do OSPF routers not maintain a DR/BDR relationship?
Point-to-point
26
How is the router ID selected?
1. Manual configuration 2. Highest IP of router's loopback interfaces 3. Highest IP of router's regular interfaces
27
What is the default OSPF network for a network using Ethernet or FDDI connections?
Broadcast
28
How does OSPF select a route when it learns multiple paths?
It devides a reference bandwidth by the actual bandwidth of the exiting interface to calculate the lowest cost
29
What is the benefit of using a loopback interface in an OSPF network?
Loopback interfaces are virtual and do not go down, thus providing stability
30
What is one task that is accomplished with the OSPF Hello protocol?
Dynamic neighbor discovery maintaining neighbor relationships
31
What are two ways to configure OSPF on a router?
1. router ospf (process id) network (ip address, wildcard) area (area id) 2. interface (interface id) ip ospf (process id) area (area id)
32
What command displays OSPF link states?
show ip ospf database
33
What algorithm is used to calculate the best route in OSPF?
Dijkstra
34
What virtual MAC address is used for VRRP?
0000.5e00.01XX
35
What virtual MAC address is used for GLBP?
0007.b400.XXYY x - group ID y - router ID
36
In FHRP protocols, what happens when the active router fails?
After the hold time, the standby/backup router becomes the new active/master router. When the old active/master router becomes active again, it does not take the role back unless you configure preempt on it.
37
What command would you use to check HSRP configuration?
#show standby
38
In HSRP, if there is no priority configured for a standby group, what determines which router is active?
Router IP address
39
What is the terminology for VRRP routers?
Master, backup
40
What is the terminology for HSRP routers?
Active/standby
41
What is a network route?
A route to a network of more than one host
42
What is a host route?
A route to a single host
43
What is a default route?
Used for forwarding packets that have no route in the routing table. Also referred to as the gateway of last resort
44
What command can you use to look at the routing table?
#show ip route
45
How is the next hop indicated in the routing table
It has "via" in front of it and is the second IP address listed in the route
46
What are the two numbers between IP addresses in the routing table in this format? [#/#]
administrative distance/metric
47
What is the IPv4 address and mask of a gateway of last resort?
0.0.0.0 0.0.0.0
48
What command can you use to see what kind of routing protocol is configured?
#show ip protocols
49
What command can you use to verify the configured OSPF process number and router ID?
show ip protocols
50
What command can you use to verify the OSPF timers?
show ip ospf
51
What command can you use to show the OSPF-enabled interfaces?
show ip ospf interface
52
What command can you use to view OSPF neighbor ID and state?
show ip ospf neighbor
53
What types of OSPF network must be configured with the ospf neighbor command?
Non-broadcast Point-to-multipoint
54
In OSPF, what is the cost of a 10 Mbps Ethernet link?
10
55
Who can a router in the DROTHER state establish adjacencies with?
DR BDR
56
What is a recursive static route?
a route for which the next hop is learned from another routing look up
57
What is a fully specified static route?
A configured route with both an outbound interface and a next-hop IP address
58
What command enables IPv6 routing?
ipv6 unicast-routing
59
What are benefits to using EIGRP over RIP?
Unequal-cost load balancing Support for networks up to 255 hops away Rapid convergance
60
What is the default cost of Gigabit Ethernet in OSPF?
1
61
What is the default cost of Fast Ethernet (100 Mbps) in OSPF?
1
62
What is the default cost of Ethernet (10 Mbps) in OSPF?
10
63
What is the default reference bandwidth in OSPF?
100 Mbps
64
What command in OSPF is used to generate a default route?
default-information originate
65
What is true about the default route in OSPF?
Not created automatically, must be configured default-information originate
66
What is true about load balancing in OSPF?
Cannot do unequal cost load balancing You can configure maximum paths up to 16, or 4 by default
67
What is the order of OSPF neighbor states?
Down Attempt 2-way Exstart Exchange Loading Full
68
What is the highest priority you can configure in OSPF?
255

CCNA (6 decks)

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